Tension-controller.



P. BRESCH.

TENSION CONTROLLER.

APPLICATION FILED JAN- 23, I914.

$3 1 56% Patented July 3, 1917.

2 SHEETSSHEET I.

WITNESSES /\Y A. @M W' W 1:

P. BRESCH.

TENSION CONTROLLER. APPLICATION FILED JAN-23,1914- 1 %31 $6M, PatentedJuly 3, 1917.

2 SHEETSSHEET 2- WITNESSES WWJYMWM 00. 3/ 6M plied to a companying drawlngs,

PAUL BRESCH, 0F PET-TIT QUEVIL LY,

FRANCE, ASSIGNOB T0 UNIVERSAL WINDING COMPANY, OF BOSTON, MASSACHUSETTS, CORPORATION OF MASSACHUSETTS.

'rnnsron-con'rnotnnn.

Learner.

To all whom it may concern:

Be it known that 1, PAUL Bunsen, a citizen of the Republic of France, residing at 78 Rue Lon Maletra, Petit Quvilly, Seine Inf, France, have invented certain new and useful Improvements in Tension- Controllers, of which the following is a specification.

My invention relates to tension-controlling devices for regulating the tension aprunning yarn or thread and is especially adaptedfor use with winding machines'or other textile apparatus. .The object of my present improvement is to provide an automatically-operated device for controlling the tension applied to the yarn to compensate for irregularities in the delivery of the yarn atthe cop or other source of supply, so as to secure a more constant and uniform ultimate tension on the yarn as it delivers to the machine. For this purpose the essential feature of my improved device consists of a regulating-means adapted to automatically reduce the amount of tension applied to the yarn by the usual tension-device whenever any abnormal resistance to its delivery occurs at the source of supply.

The invention is fully described in the folillustrated by the acin which like letters of reference designate like parts.

In the drawings Figure 1 is a side elevation of a portion of a winding machine showinga usual form of tension-device employed therewith and illustrating my new controlling-means applied thereto;

Fig. 2 is an enlarged, side view of the tension-device illustrating the arrangement of the tension-controller or regulator in connection therewith; v

Fig. 3 is a sectional view of the tensiondevice taken on the line AA of Fig. 2, looking in the direction indicated by the arrow at.

' Referring first to Fig. 1, I have here illustrated the essential elements of a well-known type of winding machine, but it is to be understood that my new ev1ce might also be lowing specification,

applied to use in connection with other forms of textile apparatus. In Fig. 1, B

designates the winding-spindle on which the bobbin 1) or other yarn-receiver is supported and rotated and C is the yarnor threadguide which acts to traverse the yarn on the bobbin. The thread-guide C is mounted on Specification of Letters Patent.

Patented July snare.

Application filed January 23, 1914. Serial No. 813,986.

a traverse-bar D arranged parallel with the winding-spindle B and is reciprocated from an oscillating rocker-arm E which is connected thereto by the link e. During the operatlon of the machine the thread-guide C is traversed back and forth with respect to the windlng-spindle B to'deposit the. yarn or thread y in conical courses or layers and the gulde C also feeds progressively along the bar to build the cop or bobbin in the form illustrated by the dot-and-dash lines 00.

Extending from the main frame F of the winding machine is an arm or bracket G on which is mounted the tension-device H for applying tension to the running yarn y. The racket G may be of any convenient form appropriate to the style and arrangement of the machine to which the. tensiondevice ripheries flared outwardly at if, as illustrated more particularly in Fig. 3, to provide a trough-like guideway which facilitates the threading of the yarn y in between their opposed faces. A double-loop, auxiliary wire-guide T is secured to the bracket G and partly surrounds the rims of the disks H, H to also assist in leading the yarn into place between them. Loosely mounted on the outer end of the stud h is a cup-shaped cap or thimble h arranged with its inner end bearing against the outer face of the disk H The inner disk H bears against a washer j which abuts the end of a hub 70, formed as a part of a wheel K, the latter being fixed on the shaft h. The wheel K may be made in the form of a pulley, gear or ratchet-disk and is employed as a turning element for the shaft h and disks H, H the mechanism for rotating the disk not being here shown as it forms no part of the present invention.

The thimble k is employed for forcing the disk H toward the disk H and any suitable means may be used for applying pressure to the thimble, such as springs or levers arranged to bear upon it. As here illustrated, I make use of a lever L having an arm Z adapted to bear against the end of the thimble k and a second arm Z on which are suspended weights m. The lever L is preferably formed of wire coiled helically at Z Z to form bearings for receiving the pivot-pin N which projects through lugs 9 g on the bracket G. The arm Z of the lever L extends vertically and is formed with a horizontal cross-piece Z positioned to reach across the outer end of the thimble h The other arm Z extends horizontally and is formed with a loop Z adapted to receive the dislclike weights m which may be added or subtracted in accordance with the amount of-pressure it is desired to apply to the disks H, H It will be obvious that in place of the above described tension-disks the well-known hinged plates or grid-members might be employed for the same purose. p Referring again to Fig. 1, I have here illustrated a tension drop-wire O mounted on the tension-bracket G and arranged with the yarn y drawing under its end 0. The drop-wire 0 serves as a stopping-lever to arrest the operation of the machine when the yarn z breaks or becomes exhausted. I have also shown a compensating-lever P pivoted on the bracket G and arranged with its end 71 adapted to engage the yarn y as it leads under the drop-wire O. The lever P acts to alternately take up and release a length of yarn y to compensate for the difference in draft on the yarn as it winds from the large diameter of the bobbin down to the small diameter and vice versa. These two members 0 and P are not necessary to -The novel. feature of the the proper working of my present invention, however, and are therefore not described in detail. They are shown in the drawings merely to illustrate the course of the yarn asit leads from its source of supply to the winding-spindle B on which it is wound into the cop or bobbin. In fact, the parts of the machine already described are all wellknown and have been long in general use. invention which operates in connection with these known elements will now be described:

Referring particularly to Figs. 2 and 3, my improved tension-regulating means consists essentially of a lever R adapted to be controlled by the yarn 3 before the latter enters the tension-device H and arranged to relieve the pressure of the lever L on the disks or other tension-elements whenever any undue resistance to the delivery of the yarn occurs at the supply-cop Y. The lever B as here shown is pivoted on the bracket G by means of a stud or pin r, but it might be mounted in any other suitable manner.

other in the arms r 7- The arm 1' reaches down below the tension-device H and is formed at its end with a pigtail or guideeye 7. The other arm 1 is arranged to pass under the outwardly bent end Z of lhe tension-lever L, reaching downwardly therefrom and terminating in the hook or loop The loop r forated weights w, and the proper number of these are applied to balance the lever R to maintain its arm 1' just in contact with the end of the tension-lever L. The supplycop Y for the yarn 12 is usually held on a spindle S arranged below the tens-hm-device. and above its end I prefer to employ a pigtail or guide-eye 8 through which the yarn passes as it leads from the cop. It will be noted that the pigtail or guide-eye 'r" is normally positioned outwardly beyond a direct line drawn from the guide-eye s to tho tension-guide T, and therefore the yarn will make a bend as it passes through the guide eye 1*. This is necessary for the proper operation of the device as later described. The method of operation of the whole arrangement is as follows:

The yarn y is drawn up from the supplycop Y through the pigtail s, thence through the guide-eye r at the end of the lever R. and then across the wire-guide T and between the tension-disks H, H From l'hc tension-device H the yarn leads under tlH end of the drop-wire 0, making a zloop over the end of the compensator P, and then draws up through the thread-guide C, having its end secured to the bobbin 6. When the operation of the machine is started the yarn is wound on the bobbin 6, while being traversed by the guide C as before described, and as it passes through the tension-device H a slight resistance to its draft is imparted thereby to provide the proper tension for securing the coils of winding in place. The amount of tension applied to the yarn may be varied as desired by placing a greater or less number of weights on the lever L to regulate the pressure of the arm Z on the thimble h and the pressure of the latter on the disk H Normally, with the yarng delivering freely from the supply-cop Y, the tension applied thereto will remain substantially constant and uniform and hence the yarn will deliver from the thread-guide C to the bobbin with the required evenness. It has been determined in practice, however, that very often the supply-cops are not wound properly and therefore they will not always deliver their yarn freely without is adapted to receive pcrhitch or hindrance. When a hitch or unevenness in delivery occurs at the supplycop this naturally sets up an increased resistance to the draft. of the yarn and hence the original tension on the yarn is considerably augumented unless some means is provided to relieve or decrease the normal or applied tension. It is for'this purpose that the controlling-lever R is arranged to act automatically in the following manner: Whenever the free delivery of the yarn from the cop Y is hindered or restricted the abnormal pull of, the yarn will act on the lever B to depress its'arm W, as illustrated by the dash-lines in Fig. 2, and this action causes the arm r to be raised against the arm Z of the lever L. As the arm 7' is carried upwardly it tilts the lever L against the action of its weights m and releases the pressure of its arm Z on the thimble 71. In this way the pressure of the disks H, H on the yarn, as it passes between them, is either partially or entirely relieved in accordance with the amount of resistance to delivery encountered at the supply-cop, and a more uniform, ultimate tension is thereby maintained on the yarn as it delivers to the winding-spindle. By varying the number of weights at on the lever B the operation of the latter can be regulated to give the proper response to variations in the delivery of the yarn at the supply-cop, and in this way a very sensitive control is maintained. My improved controller is designed to act, not only when the yarn catches on the supply-cop and is thereby hindered in its unwinding therefrom, but also in response to other variations in delivery. For instance,

the yarn will unwind much more freely from a full cop than from one nearly exhausted, and the present device is adapted to sense any such gradual variation in the delivery of the yarn and to automatically operate the tension-device to regulate-the applied tension in conformity therewith. It has been demonstrated that with the present improvement applied to a usual form of tensiondevice the yarn can be unwound at a greatly increased speed, with less breakages, and without imposing as much strain on the ma terial.

Various modifications might be made in the form and structure of the parts of my new device without departing from the spirit or scope of the invention; therefore, without limiting myself to the exact construction shown and described, what I claim is 1. The combination with a tension-device comprising two disks between which the yarn draws and means to apply pressure on the disks to cause them to press upon, the yarn, of a controlling-means arranged intermediate the disks and the source of sup ply of the yarn, said controller adapted to be operated automatically by the action of the yarn before it enters the tension-device to relieve the pressure on the disks whenever the resistance to delivery of the yarn at the supply becomes abnormal.

2. The combination with a tension-device comprising members adapted to bear upon the yarn to apply tension thereto, and a lever to operate said tension-members, of a separate controller-lever arranged to move independently of the tension-lever and adapted to actuate said tension-lever to relieve the tension on the yarn, said controllerlever arranged in the path of the yarn to be acted upon by the yarn before the latter enters the tension-device as it draws between its source of supply and the tension-device and adapted to be moved thereby whenever the delivery of the yarn is restricted or impeded.

3. The combination with a tension-device comprising tension-members adapted to bear upon the yarn to apply tension thereto, and a lever for applying pressure to said tension-members, of a separate controller-lever arranged intermediate the tension-device and the source of supply of the yarn, said controller-lever free to move independently of the pressure-lever having one end engaged by the yarn before the latter enters the tension device and its opposite end engaging the pressure-lever to operate the latter to relieve the pressure on the tensionmembers whenever abnormal resistance to the delivery of the yarn occurs at the supply.

4:. In a tension-device, the combination with tension-members adapted to bear upon the yarn to apply tension thereto, and a lever to operate said tension-members, of a pivoted controller-lever arranged in the path of the yarn as it draws from its source of supply to the tension-members with one end to be acted upon by the yarn before the latter enters the tension-device and the opposite end engaging the tension-lever, and weights on said controller-lever adapted to balance it against the normal pull of the yarn but to allow it to be moved to operate the tension-lever whenever the draft on the yarn is abnormally restricted at the supply.

5. In a tension-device, the combination with members adapted to bear on the yarn to apply tension thereto, and a lever to operate said tension-members, of a controller-lever adapted to actuate the tensionlever to relieve its operative effect, said controller-lever having a guide engaged by the yarn before it enters the tension-device, and means on said controller-lever to balance it against the normal tension of the yarn to maintain its guide 'out of alinement with the supply-cop and the tension-members whereby any abnormal resistance to the delivery of the yarn will act to move said lever to actuate the tension-lever.

(3. Tu :1 tension-device, the combination with tensionqnembers adapted to bear on lever to apply pressure to said tension- 4 members of :1 controller-lever formed with two arms, one of which is adapted to engage the end of the pressure-lever to raise the latter and relieve its pressure on the tonsion-mmnbers, and the other arm having a guide through which the yarn leads before it enters the tension-device, and weights on the controller-lever to normally restrain it from acting on the pressure-lever.

. In testimony whereof I aflix my signature in presence of two witnesses.

PAUL BRESGHQ Witnesses HENRI FISCHER, LOUIS PERM 

